USB : correct comments in usb/core/notify.c

This patch corrects the wrong function name mentioned in the comments
of usb_unregister_notify function.

Signed-off-by: Manish Katiyar <mkatiyar@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/core/notify.c b/drivers/usb/core/notify.c
index 6b36897..7542dce 100644
--- a/drivers/usb/core/notify.c
+++ b/drivers/usb/core/notify.c
@@ -33,7 +33,7 @@
  * usb_unregister_notify - unregister a notifier callback
  * @nb: pointer to the notifier block for the callback events.
  *
- * usb_register_notifier() must have been previously called for this function
+ * usb_register_notify() must have been previously called for this function
  * to work properly.
  */
 void usb_unregister_notify(struct notifier_block *nb)